void BackingStore::paint(WebCore::GraphicsContext* context, const WebCore::IntRect& clipRect)
{
// FIXME: Honor the clip rect!
OwnPtr<GraphicsContext> sourceContext(createGraphicsContext());
// FIXME: This creates an extra copy.
RetainPtr<CGImageRef> image(AdoptCF, CGBitmapContextCreateImage(sourceContext->platformContext()));
CGContextRef cgContext = context->platformContext();
CGContextSaveGState(cgContext);
CGContextDrawImage(context->platformContext(), CGRectMake(0, 0, CGImageGetWidth(image.get()), CGImageGetHeight(image.get())), image.get());
CGContextRestoreGState(cgContext);
}
void ImageBufferData::putData(Uint8ClampedArray*& source, const IntSize& sourceSize, const IntRect& sourceRect, const IntPoint& destPoint, const IntSize& size, bool accelerateRendering, bool unmultiplied, float resolutionScale)
{
ASSERT(sourceRect.width() > 0);
ASSERT(sourceRect.height() > 0);
int originx = sourceRect.x();
int destx = (destPoint.x() + sourceRect.x()) * resolutionScale;
ASSERT(destx >= 0);
ASSERT(destx < size.width());
ASSERT(originx >= 0);
ASSERT(originx <= sourceRect.maxX());
int endx = (destPoint.x() + sourceRect.maxX()) * resolutionScale;
ASSERT(endx <= size.width());
int width = sourceRect.width();
int destw = endx - destx;
int originy = sourceRect.y();
int desty = (destPoint.y() + sourceRect.y()) * resolutionScale;
ASSERT(desty >= 0);
ASSERT(desty < size.height());
ASSERT(originy >= 0);
ASSERT(originy <= sourceRect.maxY());
int endy = (destPoint.y() + sourceRect.maxY()) * resolutionScale;
ASSERT(endy <= size.height());
int height = sourceRect.height();
int desth = endy - desty;
if (width <= 0 || height <= 0)
return;
unsigned srcBytesPerRow = 4 * sourceSize.width();
unsigned char* srcRows = source->data() + originy * srcBytesPerRow + originx * 4;
unsigned destBytesPerRow;
unsigned char* destRows;
if (!accelerateRendering) {
destBytesPerRow = 4 * size.width();
destRows = reinterpret_cast<unsigned char*>(m_data) + desty * destBytesPerRow + destx * 4;
#if USE(ACCELERATE)
if (haveVImageRoundingErrorFix() && unmultiplied) {
vImage_Buffer src;
src.height = height;
src.width = width;
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dst;
dst.height = desth;
dst.width = destw;
dst.rowBytes = destBytesPerRow;
dst.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
// The premultiplying will be done in-place.
src = dst;
}
vImagePremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
return;
}
#endif
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
if (!unmultiplied)
return;
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int basex = x * 4;
unsigned char alpha = srcRows[basex + 3];
if (unmultiplied && alpha != 255) {
destRows[basex] = (srcRows[basex] * alpha + 254) / 255;
destRows[basex + 1] = (srcRows[basex + 1] * alpha + 254) / 255;
destRows[basex + 2] = (srcRows[basex + 2] * alpha + 254) / 255;
destRows[basex + 3] = alpha;
} else
reinterpret_cast<uint32_t*>(destRows + basex)[0] = reinterpret_cast<uint32_t*>(srcRows + basex)[0];
}
destRows += destBytesPerRow;
srcRows += srcBytesPerRow;
}
} else {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
IOSurfaceRef surface = m_surface.get();
IOSurfaceLock(surface, 0, 0);
destBytesPerRow = IOSurfaceGetBytesPerRow(surface);
destRows = (unsigned char*)(IOSurfaceGetBaseAddress(surface)) + desty * destBytesPerRow + destx * 4;
#if USE(ACCELERATE)
vImage_Buffer src;
src.height = height;
src.width = width;
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dest;
dest.height = desth;
dest.width = destw;
dest.rowBytes = destBytesPerRow;
dest.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { resolutionScale, 0, 0, resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
// The unpremultiplying and channel-swapping will be done in-place.
if (unmultiplied) {
srcRows = destRows;
width = destw;
height = desth;
srcBytesPerRow = destBytesPerRow;
} else
src = dest;
}
if (unmultiplied) {
ScanlineData scanlineData;
scanlineData.scanlineWidth = width;
scanlineData.srcData = srcRows;
scanlineData.srcRowBytes = srcBytesPerRow;
scanlineData.destData = destRows;
scanlineData.destRowBytes = destBytesPerRow;
dispatch_apply_f(height, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, premultitplyScanline);
} else {
// Swap pixel channels from RGBA to BGRA.
const uint8_t map[4] = { 2, 1, 0, 3 };
vImagePermuteChannels_ARGB8888(&src, &dest, map, kvImageNoFlags);
}
#else
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int basex = x * 4;
unsigned char b = srcRows[basex];
unsigned char alpha = srcRows[basex + 3];
if (unmultiplied && alpha != 255) {
destRows[basex] = (srcRows[basex + 2] * alpha + 254) / 255;
destRows[basex + 1] = (srcRows[basex + 1] * alpha + 254) / 255;
destRows[basex + 2] = (b * alpha + 254) / 255;
destRows[basex + 3] = alpha;
} else {
destRows[basex] = srcRows[basex + 2];
destRows[basex + 1] = srcRows[basex + 1];
destRows[basex + 2] = b;
destRows[basex + 3] = alpha;
}
}
destRows += destBytesPerRow;
srcRows += srcBytesPerRow;
}
#endif // USE(ACCELERATE)
IOSurfaceUnlock(surface, 0, 0);
#else
ASSERT_NOT_REACHED();
#endif // USE(IOSURFACE_CANVAS_BACKING_STORE)
}
}
PassRefPtr<Uint8ClampedArray> ImageBufferData::getData(const IntRect& rect, const IntSize& size, bool accelerateRendering, bool unmultiplied, float resolutionScale) const
{
float area = 4.0f * rect.width() * rect.height();
if (area > static_cast<float>(std::numeric_limits<int>::max()))
return 0;
RefPtr<Uint8ClampedArray> result = Uint8ClampedArray::createUninitialized(rect.width() * rect.height() * 4);
unsigned char* data = result->data();
int endx = ceilf(rect.maxX() * resolutionScale);
int endy = ceilf(rect.maxY() * resolutionScale);
if (rect.x() < 0 || rect.y() < 0 || endx > size.width() || endy > size.height())
result->zeroFill();
int originx = rect.x();
int destx = 0;
int destw = rect.width();
if (originx < 0) {
destw += originx;
destx = -originx;
originx = 0;
}
destw = min<int>(destw, ceilf(size.width() / resolutionScale) - originx);
originx *= resolutionScale;
if (endx > size.width())
endx = size.width();
int width = endx - originx;
int originy = rect.y();
int desty = 0;
int desth = rect.height();
if (originy < 0) {
desth += originy;
desty = -originy;
originy = 0;
}
desth = min<int>(desth, ceilf(size.height() / resolutionScale) - originy);
originy *= resolutionScale;
if (endy > size.height())
endy = size.height();
int height = endy - originy;
if (width <= 0 || height <= 0)
return result.release();
unsigned destBytesPerRow = 4 * rect.width();
unsigned char* destRows = data + desty * destBytesPerRow + destx * 4;
unsigned srcBytesPerRow;
unsigned char* srcRows;
if (!accelerateRendering) {
srcBytesPerRow = 4 * size.width();
srcRows = reinterpret_cast<unsigned char*>(m_data) + originy * srcBytesPerRow + originx * 4;
#if USE(ACCELERATE)
if (unmultiplied && haveVImageRoundingErrorFix()) {
vImage_Buffer src;
src.height = height;
src.width = width;
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dst;
dst.height = desth;
dst.width = destw;
dst.rowBytes = destBytesPerRow;
dst.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { 1 / resolutionScale, 0, 0, 1 / resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dst, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
// The unpremultiplying will be done in-place.
src = dst;
}
vImageUnpremultiplyData_RGBA8888(&src, &dst, kvImageNoFlags);
return result.release();
}
#endif
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
if (!unmultiplied)
return result.release();
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
if (unmultiplied) {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int basex = x * 4;
unsigned char alpha = srcRows[basex + 3];
if (alpha) {
destRows[basex] = (srcRows[basex] * 255) / alpha;
destRows[basex + 1] = (srcRows[basex + 1] * 255) / alpha;
destRows[basex + 2] = (srcRows[basex + 2] * 255) / alpha;
destRows[basex + 3] = alpha;
} else
reinterpret_cast<uint32_t*>(destRows + basex)[0] = reinterpret_cast<uint32_t*>(srcRows + basex)[0];
}
srcRows += srcBytesPerRow;
destRows += destBytesPerRow;
}
} else {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width * 4; x += 4)
reinterpret_cast<uint32_t*>(destRows + x)[0] = reinterpret_cast<uint32_t*>(srcRows + x)[0];
srcRows += srcBytesPerRow;
destRows += destBytesPerRow;
}
}
} else {
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
IOSurfaceRef surface = m_surface.get();
IOSurfaceLock(surface, kIOSurfaceLockReadOnly, 0);
srcBytesPerRow = IOSurfaceGetBytesPerRow(surface);
srcRows = (unsigned char*)(IOSurfaceGetBaseAddress(surface)) + originy * srcBytesPerRow + originx * 4;
#if USE(ACCELERATE)
vImage_Buffer src;
src.height = height;
src.width = width;
src.rowBytes = srcBytesPerRow;
src.data = srcRows;
vImage_Buffer dest;
dest.height = desth;
dest.width = destw;
dest.rowBytes = destBytesPerRow;
dest.data = destRows;
if (resolutionScale != 1) {
vImage_AffineTransform scaleTransform = { 1 / resolutionScale, 0, 0, 1 / resolutionScale, 0, 0 }; // FIXME: Add subpixel translation.
Pixel_8888 backgroundColor;
vImageAffineWarp_ARGB8888(&src, &dest, 0, &scaleTransform, backgroundColor, kvImageEdgeExtend);
// The unpremultiplying and channel-swapping will be done in-place.
if (unmultiplied) {
srcRows = destRows;
width = destw;
height = desth;
srcBytesPerRow = destBytesPerRow;
} else
src = dest;
}
if (unmultiplied) {
ScanlineData scanlineData;
scanlineData.scanlineWidth = width;
scanlineData.srcData = srcRows;
scanlineData.srcRowBytes = srcBytesPerRow;
scanlineData.destData = destRows;
scanlineData.destRowBytes = destBytesPerRow;
dispatch_apply_f(height, dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), &scanlineData, unpremultitplyScanline);
} else {
// Swap pixel channels from BGRA to RGBA.
const uint8_t map[4] = { 2, 1, 0, 3 };
vImagePermuteChannels_ARGB8888(&src, &dest, map, kvImageNoFlags);
}
#else
if (resolutionScale != 1) {
RetainPtr<CGContextRef> sourceContext(AdoptCF, CGBitmapContextCreate(srcRows, width, height, 8, srcBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
RetainPtr<CGImageRef> sourceImage(AdoptCF, CGBitmapContextCreateImage(sourceContext.get()));
RetainPtr<CGContextRef> destinationContext(AdoptCF, CGBitmapContextCreate(destRows, destw, desth, 8, destBytesPerRow, m_colorSpace, kCGImageAlphaPremultipliedLast));
CGContextSetBlendMode(destinationContext.get(), kCGBlendModeCopy);
CGContextDrawImage(destinationContext.get(), CGRectMake(0, 0, width / resolutionScale, height / resolutionScale), sourceImage.get()); // FIXME: Add subpixel translation.
srcRows = destRows;
srcBytesPerRow = destBytesPerRow;
width = destw;
height = desth;
}
if (unmultiplied) {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int basex = x * 4;
unsigned char b = srcRows[basex];
unsigned char alpha = srcRows[basex + 3];
if (alpha) {
destRows[basex] = (srcRows[basex + 2] * 255) / alpha;
destRows[basex + 1] = (srcRows[basex + 1] * 255) / alpha;
destRows[basex + 2] = (b * 255) / alpha;
destRows[basex + 3] = alpha;
} else {
destRows[basex] = srcRows[basex + 2];
destRows[basex + 1] = srcRows[basex + 1];
destRows[basex + 2] = b;
destRows[basex + 3] = srcRows[basex + 3];
}
}
srcRows += srcBytesPerRow;
destRows += destBytesPerRow;
}
} else {
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; x++) {
int basex = x * 4;
unsigned char b = srcRows[basex];
destRows[basex] = srcRows[basex + 2];
destRows[basex + 1] = srcRows[basex + 1];
destRows[basex + 2] = b;
destRows[basex + 3] = srcRows[basex + 3];
}
srcRows += srcBytesPerRow;
destRows += destBytesPerRow;
}
}
#endif // USE(ACCELERATE)
IOSurfaceUnlock(surface, kIOSurfaceLockReadOnly, 0);
#else
ASSERT_NOT_REACHED();
#endif // USE(IOSURFACE_CANVAS_BACKING_STORE)
}
return result.release();
}
